______,Place dough in a lightly oiled bowl. Cover with plastic wrap and let proof in a warm place for 45 mins, or until dough doubles in size.,Preheat oven to 425°F. Lightly oil a large baking tray. Punch dough down then transfer to a lightly floured surface and knead until smooth. Roll dough out until 1/2 inch thick. Place on prepared tray.,Sprinkle olives, tomatoes and oregano over dough, pressing in firmly. Cover with a clean tea-towel and let proof in a warm place for 15 mins, or until dough rises slightly.,Bake for 20-25 mins, or until golden brown and base is crispy. Transfer to a wire rack. Drizzle warm focaccia with remaining oil. Serve with extra oil for dipping.